Security lock for propeller

Abstract

A propeller lock for preventing unauthorized removal of a marine propeller from the drive shaft of a marine propeller gear housing, the marine propeller having a plurality of blades extending from a generally hollow cylindrical hub having an outer end and an inner end, the hub being connected to the drive shaft by a nut, the nut and the drive shaft being contained inside the hub and the outer end, including a cover for covering the outer end of the propeller to prevent removal of the nut, and rotatable clamps for connecting the cover to the propeller.

What is claimed is: 
     
       1. A propeller lock for preventing unauthorized removal of a marine propeller from the drive shaft of a marine propeller gear housing, said marine propeller having a plurality of blades extending from a generally hollow cylindrical hub having an outer end and an inner end, said hub being connected to said drive shaft by a nut, said nut and said drive shaft being contained inside said hub and said outer end, comprising: a. cover means for covering said outer end of said propeller to prevent removal of said nut, said cover means comprising a disk,   b. rotatable clamp means for attachment of said cover means to said propeller, said cover means being connected to said rotatable clamp means by a plurality of rods, said clamp means comprising two semi-circular members rotatably connected together at one end thereof by one of said rods, each of said semi-circular members having two ends, one of said two ends of said semi-circular members having a hole therein and the other of said two ends having a U-shaped bracket thereon, said U-shaped bracket having axially aligned holes extending therethrough, one end of one of said semi-circular members being received in said U-shaped bracket of the other of said semi-circular members and said holes therein being axially aligned, one of said rods being fitted through said axially aligned holes to rotatably connect said two semi-circular members together, each of said rods being an elongated rigid rod having two ends, one end of each of said rods having a bent portion generally perpendicular to the elongated portion of said rod for engaging the outside of said semi-circular members, said cover means being rigidly connected to each of said rods at the end of said rods opposite from said bent end of said rods.   
     
     
       2. The propeller lock of claim 1 wherein said rods are spaced equidistantly adjacent to the outer edge of said disk. 
     
     
       3. The propeller lock of claim 1 wherein clamp means have holes means therein for receipt of lock means. 
     
     
       4. The propeller lock of claim 1 wherein said bent ends of each of said rods means extend outwardly from the central axis of said disk a distance sufficient to engage the outside of said semi-circular members. 
     
     
       5. The propeller lock of claim 4 wherein said rods are spaced equidistantly adjacent to the outer edge of said disk. 
     
     
       6. A propeller lock for preventing unauthorized removal of a marine propeller from the drive shaft of a marine propeller gear housing, the marine propeller having a plurality of blades extending from a generally hollow cylindrical hub having an outer end and an inner end, said hub being connected to said drive shaft by a nut, said nut and said drive shaft being contained inside said hub and said outer end, comprising: a. a disk for covering said outer end of said propeller to prevent removal of said nut,   b. two semi-circular clamp means rotatably connected together at one end thereof for attachment of said propeller lock to said propeller, said clamp means being connected to said disk by a plurality of elongated rods having two ends, wherein each of said clamp means has two ends, one end of each of said rods having a bent portion generally perpendicular to the elongated portion of said rods for engaging the outside of said semi-circular clamp means, one of the two ends having a hole therein and the other end having a U-shaped bracket thereon, said U-shaped bracket having axially aligned holes extending therethrough, one end of one of said semi-circular clamp means being receivable in said U-shaped bracket of the other semi-circular member when said holes therein are axially aligned, and one of said rods is fitted through said axially aligned holes to rotatably connect said two semi-circular clamp means together, said cover means being rigidly connected to each of said rods at the end of said rods opposite from said bent end of said rods.   
     
     
       7. The propeller lock of claim 6 wherein said rod are spaced equidistantly adjacent to the outer edge of said disk. 
     
     
       8. The propeller lock of claim 6 wherein said bent ends of each of said rods extend outwardly from the central axis of said disk a distance sufficient to engage the outside of said semi-circular members. 
     
     
       9. The propeller lock of claim 8 wherein said rods are spaced equidistantly adjacent to the outer edge of said disk.